说明：  logistic、malthus人模型都可以用于预测呈指数增长的数据模型，预测未来的人口的等数据，是由人口学家提出的，可用于预测未知的数目，以及检测一些模型所得结果的正确性。
(logistic, malthus human model can be used to predict an exponential growth in data model, to predict the future, such as population data, is proposed by the demographer can be used to predict the number of unknown, as well as a number of model testing the correctness of the results.)